This variable indicates if a person's age was imputed. Imputation is a statistical process for predicting values where no response was provided to a question and a response could not be derived.
What is Person 1's date of birth?
If date of birth is not known, please select 'Don't know date of birth' and provide Person 1's age.
More information
Day Month Year
OR
Don't know date of birth
Age
Example
Image
Description
What is Person 1's date of birth?
If date of birth is not known, please select 'Don't know date of birth' and provide Person 1's age.
More information
Day Month Year
OR
Don't know date of birth (selected response)
Age years
Example
Image
Description
What is Person 1's date of birth?
If date of birth is not known, please select 'Don't know date of birth' and provide Person 1's age.
More information
Day Month Year
18 March 1993
OR
Don't know date of birth
Age
28 years
More information
Image
Description
What is Person 1's date of birth?
If date of birth is not known, please select 'Don't know date of birth' and provide Person 1's age.
More information
It is important to note:
•Date of birth is the date that the person was born.
•Age is required only if the person's date of birth is not known. Please report age at Census night – Tuesday 10 August 2021.
If the person is less than one year old and their date of birth is not known, enter '0' in the age box.
How this variable is created
When age is imputed this variable is coded to ‘02 Age imputed’. See Age (AGEP) for methods on how age is imputed.
History and changes
No changes have been made for 2021.
Data use considerations
Imputation flag for age (IFAGEP) can be used to identify how many respondents’ age was imputed at different geographical levels.
Using the Imputation Flag for Age (IFAGEP), the non-response rate for Age was 4.4% in 2021. This is a decrease from 5.6% in 2016. For more information on imputation, see Census Methodology.